Chapter 422

The news is full of the shocking news that Dongchen and Airbus have reached an agreement on the purchase intention. At this time, Zhang Yunfeng has laid down a stone in his mind. Although the people he sent have not yet evaluated all the assets of Airbus, no one in the world can afford to buy Airbus with more money than himself. Even Raymond dare not compete with him. All of them are involved People who are full of aircraft manufacturing or interested in aircraft manufacturing are afraid of one problem, which is the Dongchen aviation engineering in Zhang Yunfeng's hands.

It's a relatively long process to acquire Airbus. It's more than a month after all the evaluations have been done, and then we can reach an agreement with the people of Airbus. For such a large number of acquisition cases, for a normal enterprise, the tug of war between the two sides will last more than half a year. However, in Zhang Yunfeng's case, the tug of war is completely omitted, because he doesn't care How about some money to let Airbus choose a little cheaper when selling itself? It has no effect on me.

When Zhang Yunfeng got rid of the big idea of Airbus, the seven positioning satellites launched for Dongchen in China were already on the sky, and the launches undertaken by the United States and Australia began to enter the countdown. In another 20 days at most, all the satellites could be launched in place at one time.

However, the test of Dongchen's stereo satellite positioning system does not need to wait for all the satellites to go to the sky. Because seven satellites have been put into orbit, which covers most of the Asia Pacific region. Like the current Beidou system, Dongchen's stereo satellite navigation system has the ability of normal use in the Asia Pacific region.

The state and the military attach great importance to this positioning system. When seven satellites are put into orbit, director Liu will go to China Sea in person and meet with Zhang Yunfeng at Dongchen aviation engineering.

This time, director Liu brought a team of more than ten experts, six of whom were information technology engineers of the armed forces, and the rest were all core engineers of the Beidou satellite positioning system. This time, the military came to assess the performance indicators of the Dongchen positioning system, while Beidou engineers came to learn advanced experience, and then Decide whether to abandon the Beidou system to be built.

Zhang Yunfeng has already prepared a number of test terminals, including handheld terminals, terminal modules embedded in mobile phones, onboard, airborne and shipborne terminals.

Among them, the function of the airborne terminal is the most powerful, followed by the shipboard terminal and the vehicle terminal. The hand-held terminal is relatively weaker, and the function of the mobile terminal is weakened more seriously.

However, all the terminals have several basic functions, including three core functions: plane satellite positioning, stereo satellite positioning and satellite speed measurement.

When Zhang Yunfeng met with Liu Ganshi and a group of more than ten people, Liu asked excitedly, "Yunfeng, are you ready for the test?"

Zhang Yunfeng said calmly: "the main content of this test is very simple, in fact, it is nothing more than the test of several functions and various indicators. Moreover, our test is different from your ordinary test, so all of you should follow our arrangement. You are the test visitors, not the direct participants, and have no right to make any changes to the test content Change. "

"That's natural," Liu said in a hurry. "We come here mainly with the attitude of visiting and learning."

Zhang Yunfeng nodded and said, "the first test, let's go to the test airport, and start there."

A group of people went to the airport directly by bus, and the airport was already ready at this time. Zhang Yunfeng rented a helicopter for 22 people. At this moment, the plane stopped on the airport apron, waiting for Zhang Yunfeng's arrival.

As soon as Zhang Yunfeng got off the train with more than ten people, he said: "in general, we have finished the detection of the current coverage area. At present, we have seven satellites, covering most of the Asia Pacific region, and we have achieved that there is no dead corner in the coverage area, and there is no blind area in the region. Therefore, with regard to coverage and stability, you can Don't worry, I won't show you that. "

An engineer of Beidou system frowned and asked, "how long has your satellite been on? Have you finished covering half of the Asia Pacific region? Do you know how many blind spots are caused by the geographical environment in the Asia Pacific region? Have you monitored all those blind spots? "

Zhang Yunfeng frowned and said, "where do you and I come to learn so much nonsense?"?

"Dongchen positioning system, which is totally different from your positioning system, is that our satellite can accurately project all coordinate points to the place where each positioning signal can be transmitted and give real-time feedback on the projection situation. Instead of going out to find the blind area, we can directly see where the blind area is, OK? ”As Zhang Yunfeng said, afraid that he didn't understand, he continued: "we have countless coordinate points within the coverage area that are less than one centimeter away from each other in the plane and the three-dimensional space. If any place is not covered by the coordinate point, our satellite can distinguish it by itself, so we can immediately know how many irreversible blindness there are in the coverage area How many blind spots do you have now? Do you want me to return to give you the most complete blind area information? "

The man suddenly lost his temper. Zhang Yunfeng's face was red, but he couldn't say a word.

At this time, Zhang Yunfeng said angrily, "Dongchen positioning system, every coordinate point is very clear. When you get on the plane later, you will be able to see what is called ultra-high precision positioning system, even the instruments you always trust are far less than!"

A group of people got on the helicopter. Everyone who boarded the helicopter got a small box given by the staff. There was a set of Dongchen's hand-held positioning terminal in the box. After getting on the plane, Xiao Zheng said, "now open the hand-held terminal and look at the current location data."

A group of people hurriedly opened the positioning terminal of Dongchen. After opening, the real-time coordinates and altitude of this place appeared on the LCD screen.

Xiao Zheng said, "before the plane takes off, try the positioning accuracy of the positioning system in the plane."

When these people look at the positioning system, they find that the positioning coordinates are much longer than the general longitude and latitude. It can be seen that the positioning system of Dongchen is more accurate than the traditional longitude and latitude coordinates. However, when someone accidentally moves the positioning system in his hand, he finds that the above coordinate information will change even if it moves slightly.

"The positioning accuracy and the speed of coordinate updating are too fast!" "Almost every move, the coordinates will change," exclaimed a Beidou engineer

"If you don't use such high precision in actual use, you can enlarge the precision setting. In addition, you can turn on the real-time speed measurement function in the terminal, and the terminal will calculate the most accurate real-time moving speed according to the change and time consumption of coordinate points."

They were surprised and began to try. Sure enough, one of them couldn't help saying, "the speed of my arm just now is 2.341 kilometers per hour."

Zhang Yunfeng said: "if you throw it out, the positioning system itself can record the most accurate parabola and falling process. If you use it on an aircraft, you can see the most accurate flight path of the aircraft in flight, and this information will also be transmitted to the black box in fact, so that once the aircraft crashes, you can follow the flight path in the black box Trace data, restore the whole falling process of the aircraft. "

Said Zhang Yunfeng, pointing to an additional altimeter in the cabin, and said: "this altimeter, which I added additionally, is the same as the altimeter used by the helicopter itself, and the altimeter used by the vast majority of aircraft, but its smallest unit is one foot. Later, after the aircraft takes off, you can use the altitude data on the terminal and this altimeter Compare the above data to see whether the instrument is more accurate or the positioning system is more accurate. "

"The positioning system must be the most accurate." An engineer said: "I put the positioning terminal on my leg, and it shows that my current altitude is 45.54 meters. I hold it in my hand, and the altitude is 45.82 meters. The positioning accuracy of the altitude also reaches the standard of one centimeter. This positioning system is really powerful! I've never heard of a positioning system that can look like a 4D stereo. "

"It has many other auxiliary functions, for example, it can not only give your plane moving speed, but also give your altitude moving speed. In this way, it can more accurately record the aircraft's climbing speed, the aircraft's climbing trajectory, and even serve as a barrier for the aircraft to take off and land without vision."

People around them are surprised. They don't know Dongchen's positioning system or how powerful it is. Zhang Yunfeng said at this time: "our coordinates are three-dimensional, that is to say, when we mark a point, we will also mark the height of the point, such as the runway not far away. I We take a middle point at the end of both ends of the runway, and then input these two coordinates into the terminal. The terminal will automatically connect these two points into a line, which is the absolute center line of the runway. Because our positioning accuracy is less than one centimeter, even if there is no actual vision between the airport and the runway, the module on the display screen through the airborne positioning system The precision of the simulated field of vision is much higher than that of the naked eye and other existing equipment. The pilot can even use this system to let the aircraft take off and land in the absolute center line. It can not only know the position of the whole runway, but also clearly show how high the landing gear is from the runway ground, even if the landing gear is one centimeter away from the runway ground From, it can also accurately identify and prompt. "